Trouble Installing with Pip Command
*Created originally on Bitbucket by [AlexLCheungy (Alexander Cheung)](https://bitbucket.org/%7Ba2450462-5b70-4036-87eb-973ca4bf1a21%7D/)* on macOS using pip install openpyxl Traceback (most recent call last): File "test.py", line 1, in <module> from openpyxl import load_workbook File "/usr/local/lib/python2.7/site-packages/openpyxl/__init__.py", line 29, in <module> from openpyxl.workbook import Workbook File "/usr/local/lib/python2.7/site-packages/openpyxl/workbook/__init__.py", line 5, in <module> from .workbook import Workbook File "/usr/local/lib/python2.7/site-packages/openpyxl/workbook/workbook.py", line 7, in <module> from openpyxl.worksheet import Worksheet File "/usr/local/lib/python2.7/site-packages/openpyxl/worksheet/__init__.py", line 4, in <module> from .worksheet import Worksheet File "/usr/local/lib/python2.7/site-packages/openpyxl/worksheet/worksheet.py", line 35, in <module> from openpyxl.cell import Cell File "/usr/local/lib/python2.7/site-packages/openpyxl/cell/__init__.py", line 4, in <module> from .cell import Cell, WriteOnlyCell File "/usr/local/lib/python2.7/site-packages/openpyxl/cell/cell.py", line 15, in <module> from copy import copy File "/usr/local/Cellar/python@2/2.7.14_3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/copy.py", line 52, in <module> import weakref File "/usr/local/Cellar/python@2/2.7.14_3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/weakref.py", line 14, in <module> from _weakref import ( ImportError: cannot import name _remove_dead_weakref
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